Field evaluation of certain oils, plant extracts, pesticides and bio-insecticides and their mixtures on some sucking pests infesting watermelon and pepper plantations

Abstract EN

-The toxic effect of certain compounds including two pesticides [fenitrothion (Sumithion) and etoxazole (Baroque)], mineral 0 ; 1 (K.

z-oil), plant oils extracted from citrus such as baladi mandarin, sour orange, acidless orange and blue gum, microbial pesticides (Biofly and Agerin) and mixtures of Kz-oil with plant oils microbial pesticides, against Thrips tabaci, Aphis gossypii, Empoasca sp., Bemisia tabac and Tetranychus urticae on watermelon (اCitrullus lanatus var.cococynthoides L.) and pepper (Capsicum annum L.) plantations have been done under field conditions.The results achieved in this study can be summarized in the following: Fenitrothion was the most toxic compound followed by Kz-oil on T.

tabaci.

Plant oil extracts were of a moderate toxic effect, while etoxazole was the least toxic compound on T.

Fenitrothion was the most toxic compound followed by baladi mandarin oil extract and Kz-oil on A.

gosspyi.

Etoxazole was of a moderate toxic effect, but blue gum, sour orange ©il and ac؛dless orange oil extracts were the least toxic treatments on A.

gosspyi.

Fenitrothion was the highest effective compound in reducing the population density of Empoasca sp.

after the first spray followed by Kz-oil + baladi mandarin oil, Kz-oil + sour orange oil and etoxazole.

The other tested compounds were moderately effective except sour orange oil, acidless orange oil, blue gum oil.

Biofly and Agerin which were the least effective compounds on Empoasca sp.

No significant differences were found among compounds after the second spray.

Fenitrothion was the most effective compound in reducing the population density after the first spray followed by baladi mandarin oil, Kz-oil, Kz-oil + baladi mandarin oil and Kz-oil + blue gum oil on B.

tabaci.

The other tested compounds were moderately effective except sour orange oil.

Biofly and Agerin which were the least effective compounds.

All the tested compounds gave satisfactory result in reducing whitefly population ranged between 64.

27 and 91.

62 % after the second spray with significant differences.

Kz-oil was the most toxic